javascript - 从 jquery/javascript 函数获取数组

Question

我有一个 JavaScript 函数，它生成并返回一个新数组(数组):

function getFees(id){

    var prep = new Array, primary = new Array, secondary = new Array, vce = new Array;

    prep[0]         = 733;
    primary[0]      = 792;
    secondary[0]    = 879;
    vce[0]          = 1108;

    if (id == 2) {

        prep[1] = (prep[0] - prep[0] * 5 / 100);
        prep[1] = Math.ceil(prep[1]);

        primary[1] = (primary[0] - primary[0] * 5 / 100);
        primary[1] = Math.ceil(primary[1]);

        secondary[1] = (secondary[0] - secondary[0] * 5 / 100);
        secondary[1] = Math.floor(secondary[1]);

        vce[1] = (vce[0] - vce[0] * 5 / 100);
        vce[1] = Math.floor(vce[1]);

    } else if (id == 3) {

        prep[2] = (prep[0] - prep[0] * 10 / 100);
        prep[2] = Math.ceil(prep[2]);

        primary[2] = (primary[0] - primary[0] * 10 / 100);
        primary[2] = Math.ceil(primary[2]);

        secondary[2] = (secondary[0] - secondary[0] * 10 / 100);
        secondary[2] = Math.floor(secondary[2]);

        vce[2] = (vce[0] - vce[0] * 10 / 100);
        vce[2] = Math.floor(vce[2]);

    } else if (id == 4) {

        prep[3] = (prep[0] - prep[0] * 50 / 100);
        prep[3] = Math.ceil(prep[3]);

        primary[3] = (primary[0] - primary[0] * 50 / 100);
        primary[3] = Math.ceil(primary[3]);

        secondary[3] = (secondary[0] - secondary[0] * 50 / 100);
        secondary[3] = Math.ceil(secondary[3]);

        vce[3] = (vce[0] - vce[0] * 50 / 100);
        vce[3] = Math.floor(vce[3]);

    } else if (id >= 5) {

        prep[4] = (prep[0] - prep[0] * 75 / 100);
        prep[4] = Math.floor(prep[4]);

        primary[4] = (primary[0] - primary[0] * 75 / 100);
        primary[4] = Math.ceil(primary[4]);

        secondary[4] = (secondary[0] - secondary[0] * 75 / 100);
        secondary[4] = Math.ceil(secondary[4]);

        vce[4] = (vce[0] - vce[0] * 75 / 100);
        vce[4] = Math.floor(vce[4]);

    }

    var newArray = [];

    newArray.push({'prep':prep}); //prep array = 733,697
    newArray.push({'primary':primary}); //primary array = 792,753
    newArray.push({'secondary':secondary}); //secondary array = 879,835
    newArray.push({'vce':vce}); //vce array = 1108,1052

    return newArray;
}

基本上我已经在底部的 .push 部分给出了一个示例。然后我通过这样做来调用我的函数:

var fees = getFees(2);
alert(fees);

哪个警报:

[object Object],[object Object],[object Object],[object Object]

如果我这样做:

alert(fees.toSource());

我明白了:

[{prep:[733, 697]}, {primary:[792, 753]}, {secondary:[879, 835]}, {vce:[1108, 1052]}]

我需要做的是从任何项目(准备/主要/次要/vce)中获取编号，例如..

fees.prep[0];
fees.primary[1];

但是当我尝试这样做时，我收到此错误:

类型错误:fees.prep 未定义

我错过了什么？任何帮助将不胜感激!! :)

Answer 1

你需要这样访问

fees[0].prep[0];